Zapco ST-104D SQ III Amp 4-Channel Class D Compact Amplifier 4x100w RMS

The ST-III amps were the first to get the new Studio brushed aluminum finned chassis

The new Class D Studio MINI Amplifiers. Over the last couple of years Zapco has introduced more than our pure high end SQ Competition amps. We have also introduced a line of great sounding amps in an affordable price range called the Studio series. The Studio D amps are full range Class D amps with great sound, a compact chassis, and more crystal clear power than the competition. Thanks to a brand new technology, we are able use the NXP Class D solution to get amazing power and performance in a incredibly compact chassis with over 90% efficiency. And this diminutive little beast has all the features of the larger amps... and optional HD Bluetooth streaming! 

The HD Bluetooth Module (optional) is a Qualcomm CSR8675 premium-tier single-chip solution with 120 MHz DSP, delivering high-quality wireless audio performance over Bluetooth and aptX HD making it an ideal choice for premium audio products. What makes the MINI amps truly amazing is their extremely small sizes. 

Product Features:

• Optional HD Bluetooth
• 4-Channel, Full Range, Class D
  
• RCA and Speaker Level inputs
  
• Variable input gain control
  
• Variable electronic crossover
  
• Variable bass boost control
• Power @ 4Ω: 4 x 100 watts RMS
  
• THD @ Rated Power < 0.5%THD
  
• Power @ 2Ω: 4 x 150 watts RMS
  
• Power Bridged @ 4Ω: 2 x 300 W RMS
  
• Signal to Noise Ratio > 90dB
  
• THD + Noise < 0.1%
  
• Frequency Response 15Hz to 30KHz ±1dB
  
• Input Sensitivity .35v to 9v (Low)
  
• Net Dimensions (mm): 124(W) x 50(H) x 213(L)
  
• Overall Dimensions (mm): 124(W) x 50(H) x 242(L)
  

Specification